3 edition of Numerical simulation of the effects of radially injected barium plasma in the ionosphere found in the catalog.
Numerical simulation of the effects of radially injected barium plasma in the ionosphere
|Statement||by Daniel W. Swift.|
|Series||NASA contractor report -- NASA CR-175638.|
|Contributions||United States. National Aeronautics and Space Administration.|
|The Physical Object|
Full text of "DTIC ADA Naval Research Laboratory Review." See other formats. Plasma Diagnostics through Kinetic Modelling. Materials scientists at Lawrence Livermore National Laboratory (LLNL) have used a novel pulsed-ion-beam method to identify mechanisms of radiation defect formation in silicon. Previous to the present work, a formal calculation was approved [1,2] to support the operation of the High Flux Isotope Reactor (HFIR) Horizontal Beam-Tube 1 of 4 (HB-1). The present calculation [3,4] repeats the previous work using COMSOL Multiphysics® software and extends the analysis to cover a broader range of coolant flow.
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Numberical simulation of the effects of radially injected barium plasma in the ionosphere Swift, D. Abstract. The morphology of the ion cloud in the radial shaped charge barium injection was studied.
A numerical model is used to calculate the motion of ions and electrons subject to the electrostatic and lorenz forces. Publication. Get this from a library. Numerical simulation of the effects of radially injected barium plasma in the ionosphere: technical report to the National Aeronautics and Space Administration on grant NAGW [Daniel W Swift; United States.
National Aeronautics and Space Administration.]. ﬁlicreportﬂ /3/22 page 2 2 Abstract In this thesis, we study numerically the one-dimensional non-relativistic Vlasov equation for a plasma consisting of electrons and inni.
Numerical simulation of the effects of radially injected barium plasma in the ionosphere [microform]: t IPS Radio and Space Services technical report / Department of Science; The dynamics of the Venus ionosphere [microform] / K.L. Miller. Since the barium release occurred in the upper F region, a collisionless plasma simulation model was used to study the electrostatic effects of a radially streaming cold plasma.
Using a 2 1/2imensional electrostatic particle simula- tion code , treating full ion and electron dynamics, the expansion of a radial azimuthally symmetric ion cloud Author: E.M.
Wescott, H.C. Stenbaek-Nielsen, T.J. Hallinan, C.S. Deehr, J.V. Olson, J.G. Roederer, R.D. Sydo. Mathematics and Computers in Simulation XXVI () North-Holland SIMULATION OF IONOSPHERE: A NUMERICAL TECHNIQUE N.S.
CHAUHAN Department of AstronomEand Space Sciences. Punjabi University. Pali, da-!', India A numerical technique has been developed to solve the time-dependent equation of continuity c-f plasma for the ionosphere.
The spatiotemporal pattern for the development of a plasma cloud formed in the ionosphere and the main cloud gas-dynamic characteristics have been obtained from 3D calculations of the explosion-type plasmodynamic flows previously performed by us. An approximate method for estimating the plasma temperature and ionization degree with the introduction of the effective.
For advanced undergraduate and beginning graduate students in atmospheric, oceanic, and climate science, Atmosphere, Ocean and Climate Dynamics is an introductory textbook on the circulations of the atmosphere and ocean and their interaction, with an emphasis on global scales.
It will give students a good grasp of what the atmosphere and oceans look like on the large-scale and why they look. A key aspect of the numerical simulation of turbulent effects is generation of 2D random phase screens that imitate distortion of the wavefront during propagation through the atmosphere.
One of the first papers devoted to numerical simulation of turbulent distortions of optical waves was by Buckley, who used a Fourier transform (method of. A numerical simulation of a technical radio frequency inductively coupled plasma was made with three coils and coupled power in the range of kW.
The generator frequency varied from to An inductively coupled plasma (ICP) is analyzed by means of experiments and numerical simulation. Important plasma properties are analyzed, namely, the effective temperature inside the central channel and the mean flow velocity inside the plasma.
Furthermore, the effect of torches with different injector diameters is studied by the model. The temperature inside the central channel is. The BPD is characterized by 1) a large increase in the plasma production rate indicated by the increase in the A light intensity + plasma density, 2) intense wave emissions in a broad band centered at the plasma frequency and a second band extending from a few KHz up to the electron cyclotron frequency, 3) beam heating, and 4) radial expansion and pitch angle scattering of the primary.
This is consistent with theoretical predictions in , where the focusing properties of a radially polarized vortex beam are investigated using a numerical simulation. The linearly and. In this simulation, an electron beam (blue circles) passes through a mixture of hydrogen and xenon gases that it ionizes, transforming the mixture into a plasma of protons, xenon ions, and.
 The ambient simulation density is n =which is a low number to reduce computational effort but not too low to resolve kinetic plasma effects. The plasma frequency is chosen to have ambient plasma periods during one beam pulse injection.
The magnetic field is directed along the x axis with a strength such that the relativistic gyrofre. controlled temporary modification to the plasma temperature at desiredaltitude.
• Use in conjunction with diagnostics to study, in a cause and effect fashion: • EM propagation, plasma turbulence and instabilities • Response of magnetospheric plasma and Radiation Belts to controlled perturbations of the ionospheric plasma 36 acres 5 Global Navigation Satellite System The GNSS satellites transmit codes generated by atomic clocks, navigation messages and system-status information Signals are modulated on two carrier frequencies L1 on GHz and L2 on GHz The original GPS design contained two ranging codes: ᴼ Coarse/Acquisition or C/A code, available to the public.
The fluid-Poisson equations coupled with the Monte Carlo method were used to simulate the spatio-temporal behavior of a needle-like argon electron-beam plasma. Based on the Monte Carlo simulation, three coupled parameters characterizing the electron beam propagation for initial energies above several keV were expressed using a universal dimensionless shape function given in terms of.
2-dimensional FDTD simulations of plasma wave propagations in the ionosphere Taketoshi Miyake1, Shujiro Yoshino1, Toshimi Okada1, Keigo Ishisaka1 1. Toyama Prefectural University, Imizu, ToyamaJapan Tel: +, E-mail: [email protected] We developed a 2-dimensional FDTD simulation code which can treat wave propagations in.
By combining the linear theory and numerical simulations, we study the response of a radially bounded axisymmetric plasma to relativistic charged particle beams in a wide range of plasma densities. In order to study the response of tungsten under high heat load, the nonlinear thermodynamic equations considering the phase transition were established to the tungsten target irradiated by intense pulsed ion beam.
Also the equations which describe the thermal stress and the total strain produced by the changed temperature in the material element were built. Introduction.
Coupled thermosphere‐ionosphere numerical models have been successfully used to interpret observations and to understand the physics of the near‐Earth region for several decades [see, e.g., Rees et al., ; Roble et al., ; Fuller‐Rowell et al.,; Crowley et al.,and references therein].The study of ionospheric storm mechanisms has particularly.
Generation and control of reactive species in low temperature atmospheric pressure plasma sources Mr. Seán Kelly A Dissertation submitted in fulﬁlment of the requirements for the award of Doctor of Philosophy (Ph.D.) presented to the School of Physical Science Faculty of Science and Health Dublin City University Supervisor: Prof.
Miles M. Turner. NUMERICAL SIMULATION OF BEAM-BEAM EFFECTS IN THE PROPOSED ELECTRO-ION COLLIDER AT JEFFERSON LAB∗ Balsˇa Terzic´†, Yuhong Zhang, Jefferson Lab, Jefferson Avenue, Newport News, VAUSA Abstract One key limiting factor to a collider luminosity is beam-beam interactions which usually can cause serious emit.
Polarized supersonic plasma flow simulation for charged bodies such as dust particles and spacecraft F. Melands01 and J. Goree2•* 1The Auroral Observatory, University ofTromsD, N TromsD, Norway 2Department of Physics and Astronomy, The University of Iowa, Iowa City, Iowa (Received 23. case, a source of plasma density structures in the polar day-side ionosphere.
Key words. Magnetospheric physics (magnetopause, cusp, arid boundary layers, magnetosphere-ionosphere interac-tions) – Ionosphere (ionospheric disturbances) 1 Introduction Polar patches Polar patches in the high-latitude dayside ionosphere are.
A numerical modeling investigation of the spectral emission of laser-induced plasma in MgCl 2 -NaCl aqueous solution has been presented. A model based on equilibrium equations has been developed for the computation of the plasma composition and excited levels population. Physical interpretation is presented to comment on firstly the evolution of atomic species number densities, and secondly on.
Narrow laser beams directed from aircraft may at times pass through the exhaust plume of the engines and potentially degrade some of the laser beam characteristics. This paper reports on controlled studies of laser beam deviation arising from propagation through turbulent hot gases, in a well-characterized laboratory burner, with conditions of relevance to aircraft engine exhaust plumes.
SPS to drive a plasma-wake allowing to accelerate electrons from a few MeV to the GeV scale within a single plasma stage of a few meter length . For this purpose a low-energy electron beam is bent onto the high-energy proton beam trajectory a few meters upstream of the plasma cham-ber (Figure 1) .
This paper reports on studies performed. "The ionosphere is a layer of the atmosphere that is subject to solar radiation," Horton explained.
"Due to the sun's high-energy solar radiation plasma wind, nitrogen and oxygen atoms are ionized, or stripped of their electrons, creating plasma gas." "It was very exciting and revealing to see how complex these plasma structures really are.
Objective: This study aims to obtain an alternative method to reduce the tumor. Optimization of collimator and in vivo Boron Neutron Capture Therapy (BNCT) materials on translucent beam reactor Kartini Reactor eligible IAEA.
Method: BNCT is a kind of alternative nuclear therapy that utilizes the reaction of 10B (n,) 7Li which produces a total kinetic. Solution (8) may involve numerical integration, depending on the form of q rv(). Boundary conditions for the radial heat flow In order to determine the unknown temperature T1 of the inner ceramic wall, together with equation (2) we take into consideration the distribution of the heat.
The streamer-like behavior of the fast plasma bullets or ionization waves launched in ambient air for every high-voltage pulse, already emphasized in the literature from experimental or analytical considerations or recent preliminary fluid models, is confirmed by a numerical one-moment fluid model for the simulation of the ionization wave dynamics.
Device used to align the position indicating device (PID) in relation to tooth and receptor; positions the intraoral receptor in the mouth and retains the receptor in position during exposure; helps stabalize the receptor in the mouth and reduces the chances of movement, thus.
The plasma composition, equation of state, and phase diagram of dense helium plasma were calculated for temperatures of 10 4 10 5 K, total atom densities of 10 15 10 25 cm− 3, and pressures up to 10 2 TPa, including the region of partial ionization and strong Coulomb coupling.
The basic thermodynamic potential was chosen to be the free energy density with contributions due to Coulomb. proton-driven plasma wake eld acceleration. AWAKE will be the rst proton-driven plasma wake eld experiment world-wide and will be installed in the CERN Neutrinos to Gran Sasso facility .
An electron witness beam will be injected into the plasma to observe the e ects of the proton-driven plasma wake eld: plasma simulations. Some models have begun to include effects of localized heating and loss, as well as radial transport [Varotsou et al., ; Shprits et al., b; Tu et al., ].
Each type of periodic motion in the earth's magnetic field, gyro, bounce and drift motion, has an associated adiabatic invariant, referred to as the first, second and third.
c The Japan Society of Plasma Science and Nuclear Fusion Research Keywords: radiationtrapping,heliumplasma,collisional-radiativemodel,electrondensity,electrontemperature, metastable state, RF plasma DOI: /pfr 1.
Introduction Analysis of the intensity of atomic line radiation by the collisional-radiative model is a standard. It is found that unlike its propagation invariant properties in free space, the propagation factor of a radial laser array beam increases on propagation in turbulent atmosphere, and is closely related to the parameters of initial beam and the atmosphere.
1. Introduction  The energetic electron flux (E > keV) in the Earth's outer radiation belt (3. This option allows users to search by Publication, Volume and Page Selecting this option will search the current publication in context.
Selecting this option will search all publications across the Scitation platform Selecting this option will search all publications for the Publisher/Society in context.the plasma to produce axial profiles of temporally and spectrally resolved fluorescence images of He m atoms and ground state nitrogen ions in the plasma jet.
The axial distribution and similarities in the temporal behavior of the helium metastable and ground state nitrogen ion.laser can drive plasma electrons in an underdense plasma further into the target, forming a critical surface.
For a cold electron population, hole-boring acceleration takes place. The plasma critical surface recedes at the hole-boring ve-locity, vHB, reﬂecting ions at a velocity of 2vHB. Recent experiments with intense, circularly polarized.